现象：A进线911开关、B进线921开关都跳闸、母联900开关合闸、911开关微机保护装置显示6KV电压正常。

属于替牙期间暂时性错的是（）

A:恒前牙反 B:恒前牙盟出时，出现中度拥挤 C:前牙开1mm D:上下恒切牙盟出早期，出现前牙深覆 E:上下颌第1恒磨牙建初期，完全远中关系

设二次型为二次型的矩阵A的特征向量．求常数a，b；

对给定的关键字序列110，119，007，911，114，120，122进行基数排序，则第2趟分配收集后得到的关键字序列是

A:007，110，119，114，911，120，122 B:007，110，119，114，911，122，120 C:007，110，911，114，119，120，122 D:110，120，911，122，114，007，119

按如下程序进行运算：

并规定，程序运行到“结果是否大于65”为一次运算，且运算进行4次才停止。则可输入的整数x的个数是_________

4

若二次根式有意义，则x的取值范围是__.

x≥

【解析】试题解析：根据二次根式有意义，分式有意义得：3x-1≥0，
解得：x≥.

已知的值 （ ）

A: 不大于 B:大于 C:不小于 D: 小于

实验测得四组(x,y)的值是(1,2),(2,3),(3,4),(4,5)，则y与x之间的回归直线的方程是 （ ）

A:=x＋1 B:=x+2 C:=2x+1 D:=x－1

（2011·河南郑州四中第一次调研）Department of Homeland Security and CIA produced ______ joint report on Monday warning that ______ next 911 could in fact occur on ______ different datE.

A:the; a; the B:a; the; a C:/; the; the D:a; /; the

II. 语法填空：(10×2)

People can call 911 when they need help. The police 1 (come) quickly. This phone number should be used only 2 an emergency. 3 there have been some problems with people using the 911 phone number. More than half of the calls made to it are an accident. These accidental calls are not real emergencies.

Calling 911 when you do not need 4 can be very baD. It wastes the time of the people answering the calls. It can even force someone 5 has a real emergency to wait before getting the help they neeD.

Many accidental 911 calls come from cellphones. Sometimes keys on the phones 6 (push) and the call goes through without the owner of the phone 7 (know) that he has called an emergency number. People are trying to find a way to solve this problem.

They are testing 8 new program that might help solve the problem of accidental 911 calls. This program will make 9 (call) of 911 push another key on the phone 10 it is a real emergency. People hope that this change will reduce the number of accidental 911 calls going through.

1.will come  2.in  3.But  4.it  5. who  6. are pushed  7. knowing  8.a   9.callers  10.if / when