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【简答题】
6 Section D Directions: In this section you will hear a recorded short passage. The passage is printed in the test paper, but with some words or phrases missing. The passage will be read three times . During the second reading, you are required to put the missing words or phrases on the Answer Sheet in order of the numbered blanks according to what you hear. The third reading is for you to check your writing. Now the passage will begin. Good morning, ladies and gentlemen! Good news for you! A new after-school child care center is going to be built in this area of the city. This center is to provide a 20 environment for children between 3 and 11 years old. When it is completed we can offer a new after-school 21 with long opening hours, so we can 22 of working parents and their children. We are also 23 help, such as providing facilities, soft toys and so on. We will be 24 for any help, as help is always very limited.
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【单选题】支气管哮喘不典型的表现为
A.
发热
B.
胸闷或干咳
C.
咯血
D.
反复发作性呼气性呼吸困难
E.
胸疼
【判断题】创建好空白数据库后,系统将自动进入“数据表视图”。
A.
正确
B.
错误
【简答题】支气管哮喘的典型表现为发作性______或发作性胸痛和咳嗽,伴有_____的呼吸困难。
【单选题】支气管哮喘不典型的表现为
A.
发热
B.
胸闷或干咳
C.
咯血
D.
反复发作性呼气性呼吸困难
E.
胸痛
【单选题】已知n线性方程组成的线性方程组含有n个未知量,则下列说法错误的是
A.
方程组系数行列式不为零,则该方程组一定有唯一解。
B.
若该方程组为齐次方程组,且系数行列式不为零,则一定只有零解。
C.
若为齐次线性方程组,则该方程组不一定有解。
D.
该方程组不一定能由克莱默法则计算。
【简答题】含有 个未知量 个方程的齐次线性方程组有非零解的充要条件是系数行列式等于 .
【单选题】有如下类定义: class B { public:void funl{} private:void fun2{} protected:void fun3{} }; class D:public B j protected:void fun4{} }; 若obj是类D的对象,则下列语句中不违反访问控制权限的是( )。
A.
obj.fun1;
B.
obj.fun2;
C.
obj.tim3;
D.
ohj.fun4;
【简答题】含有 个未知量 个方程的齐次线性方程组有非零解的充分且必要条件是____。
【判断题】一个含有 个未知量, 个方程的齐次线性方程组只有零解的充要条件是它的系数行列式不为零。
A.
正确
B.
错误
【单选题】支气管哮喘不典型的表现为
A.
发热
B.
胸闷或干咳
C.
咯血
D.
反复发作性呼气性呼吸困难
E.
胸痛
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