MASK

服务器IP为10.55.1.148，mask 255.255.255.0，getway10.55.1.1，客户端IP为10.55.33.18，mask 255.255.255.0，getway10.55.33.1，此时在客户端访问服务器配置本地IP正确的是（）.

A:IP10.55.1.200，mask 255.255.255.0，getway10.55.1.1 B:IP10.55.1.200，mask 255.255.255.0 C:IP10.55.33.200，mask 255.255.255.0，getway10.55.33.1 D:IP10.55.33.200，mask 255.255.255.0

为Mask制作Shape动画后，使用下列哪个命令可以方便的提高动画精度？（）

A:调节Mask Feather B:修改Mask Opacity C:应用Smart Mask Interpolation D:设置Mask Expansion

Gas mask的意思是（）。

A:空气呼吸器 B:压力气瓶 C:防毒面具 D:压缩空气

当ACP上BOOM/MASK开关在MASK位时（）

A:飞行员吊架话筒失效 B:吊架话筒和氧面话筒均工作 C:吊架话筒和氧面话筒均不工作 D:无变化

Nature has devised many ways to protect creatures’ eyes. The most common protection is the eyelid—a fold of skin that closes over the eye, protecting it from damage. Eyelashes are useful for keeping out dust and other irritants, and tears wash away any particles that get through the other defenses.
Some creatures, including most birds, have three eyelids. The upper and lower lids act like human lids and keep out twigs, dirt and sand. The third eyelid, however, is a semitransparent tissue that crosses over the eye from the inside corner to the outside corner. Because of this protective membrane, birds seldom have to blink. They close their eyes only when they go to sleep. In ducks, this third eyelid self as an underwater diving mask that helps the ducks find food.
Most fish and snakes have no eyelids at all. Instead, a hard glassy covering protects their eyes. In fish, water constantly sweeps away dirt from the covering. And a snake’s eyesight is usually so bad that a little dirt obscuring its vision does not disturb it greatly.
Eyelashes defend the eye by shading it from glare. They also act like miniature brushes to remove dust. Camels have lashes that are four inches long to protect their eyes from windblown sand in the desert.
The author compares the duck’s third eyelid to a ______.

A:tissue B:glassy covering C:tiny brush D:diving mask

Nature has devised many ways to protect creatures’ eyes. The most common protection is the eyelid--a fold of skin that closes over the eye, protecting it from damage. Eyelashes are useful for keeping out dust and other irritants, and tears wash away any particles that get through the other defenses.
Some creatures, including most birds, have three eyelids. The upper and lower lids act like human lids and keep out twigs, dirt and sand. The third eyelid, however, is a semitransparent tissue that crosses over the eye from the inside corner to the outside corner. Because of this protective membrane, birds seldom have to blink. They close their eyes only when they go to sleep. In ducks, this third eyelid self as an underwater diving mask that helps the ducks find food.
Most fish and snakes have no eyelids at all. Instead, a hard glassy covering protects their eyes. In fish, water constantly sweeps away dirt from the covering. And a snake’s eyesight is usually so bad that a little dirt obscuring its vision does not disturb it greatly.
Eyelashes defend the eye by shading it from glare. They also act like miniature brushes to remove dust. Camels have lashes that are four inches long to protect their eyes from windblown sand in the desert.
The author compares the duck’s third eyelid to a ______.

A:tissue B:glass covering C:tiny brush D:diving mask

Passage Three

A:tissue B:glass covering C:tiny brush D:diving mask

Face Masks May Not Protect from Super-Flu If a super-flu strikes, face masks may not protect you. Whether widespread use of masks will help, or harm,during the next worldwide flu outbreak is a question that researchers are studying furiously. No results have come from their mask research yet. However, the government says people should consider wearing them certain stations anyway, just in case. But it’s a question the public keeps asking while the government is makingpreparations for the next flu pandemic （大流行）.So the Centers for Disease Control and Prevention （CDC） came up with preliminary guidelines. "We don’t want People wearing them everywhere," said the CDC. The overall recommendation really is to avoid exposure.” When that is not possible, the guidelines say you should consider wearing a simple surgical mask if you are in one of the three following situations. First, you’re healthy and can’t avoid going to a crowded place. Second, you’re sick and think you may have close contact with the healthy, such as a family member checking on you. Third, you live with someone who’s sick and thus might be in the early stages of infection, but still need to go out. Influenza pandemics can strike when the easy-to-mutate （变异）flu virus shifts to a strain（菌株）that people never have experienced. Scientists cannot predict when the next pandemic will arrive, although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person. During the flu pandemic, you should protect yourself. Avoid crowds, and avoid close contact with the sick unless you must care for someone. Why aren’t masks added to this self-protection list? Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets （飞沫）. Besides, the CDC is afraid masks may create a false sense of security. Perhaps someone who should have stayed home would don（戴）an ill-fitting mask and hop on the subway instead. Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. If you touch that spot next and then put germy hands on your nose or mouth, you’ve been exposed. It’s harder to rub your nose while wearing a mask, so your face may get pretty sweaty under masks. You reach under to wipe that sweat, and may transfer germs caught on the outside of the mask straight to the nose. These are the problems face masks may create for their users. Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing. What is the passage mainly about?

A:Widespread use of face masks. B:Possibility of a worldwide flu outbreak C:New discoveries of a face mask research. D:Effectiveness of wearing face masks