U. S. to Start $3.2 Billion Child Health Study in January

    A study that will cost $3.2 billion and last more than two decades to track the health of 100,000 U.S. children from before birth to age 21 will be launched in January, U. S. health officials said on Friday.

    Officials from the U.S.government’s National Institutes of Health said they hope the study, to be conducted at 105 locations throughout theUnited States, can help identify early-life influences that affect later development, with the goal of learning new ways to treat or prevent illness.

    The study will examine hereditary and environmental factors such as exposure to certain chemicals that affect health.

    Researchers will collect genetic and biological samples from people in the study as well as samples from the homes of the women and their babies including air,

water, dust and materials used to construct their residences, the NIH said.

    Officials said more than $200 million has been spent already and the study is projected to cost $3.2 billion.

    “We anticipate that in the long term¹，what we learn from the study will result in a significant savings in the nation’s health care costs,” Dr. Duane Alexander, who heads the NIH’s Eunice Kennedy Shriver National Institute of Child Health and Human Development, told reporters.

    The study will begin in January when theUniversityofNorth Carolinaand the Mount Sinai School of Medicine inNew Yorkstart signing up² pregnant women whose babies will then be followed to age 21.

    Some of the early findings will be about factors behind pre-term birth³, which has become more common in recent years, according to Dr. Peter Scheidt of the NIH, who heads the study.

    The people taking part will be from rural, urban and suburban areas, from all income and educational levels and from all racial groups, the NIH said.

词汇：

hereditary /hɪ"redɪt(ə)rɪ/ adj.遗传的

注释：

1.in the long term：从长远说来

2.sign up：使报名从事

3.pre-term birth：早产

Researchers will collect all the following EXCEPT____

A:genetic samples from people in the study B:biological samples from people in the study C:samples from the homes of the women and their babies D:samples of air and water from hospitals

在Excel，使用Del键（）。

A:可以删除活动单元格的文字 B:不能删除活动单元格的文字 C:不能删除活动单元格的颜色 D:可以删除活动单元格的颜色

以下快捷键中，与Shift+Del、Ctrl+Del键对应的是（）

A:+{DELETE}、+{DEL} B:+{DEL}、+{DEL} C:+{DELETE}、^{DELETE} D:+{DEL}、^{DELETE}

一般在启动机器时，都会看到“Press DEL to enter Setup”的提示信息，它是提示用户（）

A:按“DEL”键进行安全模式 B:按“DEL”键打开启动菜单 C:按“DEL”键进行DOS实模式 D:按“DEL”键打开CMOS设置对话框

在下图所示的树形文件系统中，方框表示目录，圆圈表示文件，“/”表示目录名之间的分隔符，“/”在路径之首时表示根目录。假设“..”表示父目录，当前目录是Y1，那么，指定文件F2所需的相对路径是（1）；如果当前目录是X2，“DEL”表示删除命令，那么，删除文件F4的正确命令是（2)。 （2）处填（）

A:DEL../Y3/F4 B:DEL X2/Y3/F4 C:DEL Y3/F4 D:DEL/Y3/F4

在下图所示的树形文件系统中，方框表示目录，圆圈表示文件，“/”表示目录名之间的分隔符，“/”在路径之首时表示根目录。假设“..”表示父目录，当前目录是Y1，那么，指定文件F2所需的相对路径是（1）；如果当前目录是X2，“DEL”表示删除命令，那么，删除文件F4的正确命令是（2）。 （2）是（）

A:DEL../Y3/F4 B:DEL X2/Y3/F4 C:DEL Y3/F4 D:DEL/Y3/F4

在下图所示的树型文件系统中，方框表示目录，圆圈表示文件，“/” 表示目录名之间的分隔符，“/”在路径之首时表示根目录。假设“..”表示父目录，当前目录是Y1，那么，指定文件F2 所需的相对路径是 （29） ；如果当前目录是X2，“DEL”表示删除命令，那么，删除文件F4 的正确命令是 （30） 。 （30）是（）

A:DEL../Y3/F4 B:DEL X2/Y3/F4 C:DEL Y3/F4 D:DEL /Y3/F4