氨茶碱（） A.抑制细胞内磷酸二酯酶，减慢cAMP的分解 B.β2受体激动剂 C.减

在镗床上加工孔，假设主轴纯径向圆跳动而使轴主心线在Y方向（水平）上作简谐直线运动，其频率与主轴转速相同，加工后工件径向会有（）误差。

A.椭圆形

B.多棱形

C.很小的

司可巴比妥属于（）

A.超短效类（1/4h）

B.短效类（2～3h）

C.中效类（4～6h）

D.长效类（6～8h）

E.超长效类（>8h）

有以下程序： #include ＜iostream＞ using namespace std; class A { public: A(int i,int j){ a=i; b=j;} void move(int x,int y){ a+=x; b+=y;} void show(){ cout＜＜a＜＜","＜＜b＜＜end1;} private: int a,b; }; class B: private A { public: B(int i,int j): A(i,j) {} void fun(){ move(3,5); }void fl () { A::show(); } }; int main() { B d(3,4);d.fun();d.f1();return 0; } 程序执行后的输出结果是

A．3,4

B．6,8

C．6,9

D．4,3

Questions 4—5 are based on the following:
Any person who drops out of high school will be unemployed unless he or she finds a low-paying job or has relatives with good business connections.

Which one of the following conclusions CANNOT be validly drawn from the statement above

A．Any person who drops out of high school, will be unemployed, have a low-paying job, or have relatives with good business connections.

B．Any high school dropout who has neither a low-paying job nor relatives with good business connections will be unemployed.

C．Any employed person who has neither a low-paying job nor relatives with good business connections is not a high school dropout.

D．Any high school dropout who has a job that is not lowpaying must have relatives with good business connections.

E．(E) Any person who has relatives with good business connections and who is not a high school dropout must be employed at a job that is not low-paying.

同一房屋下有多个户口簿，且户籍地址与房屋产权地址一致，可由用电客户房屋（）向供电公司提出增加家庭人口用电基数的调增业务申请。

A.经营者

B.使用者

C.租用房屋人

D.产权所有人