若有定义int a;float b;double c;程序运行时输入：3 4 5能把值3输入给变量a、4输入给变量b、5输入给变量C的语句是（　　）。

A、scanf("%lf%lf%lf",&a,&b,&c);

B、scanf("%d%lf%lf",&a,&b,&c);

C、scanf("%d%f%f",&a,&b,&c);

D、scanf("%d%f%lf",&a,&b,&c);

对医院污水使用含氯消毒剂进行消毒，下列方法正确的是（）

A、干粉按有效氯25mg/L用量加入污水中，作用1小时后排放

B、干粉按有效氯25mg/L用量加入污水中，作用2小时后排放

C、干粉按有效氯50mg/L，用量加入污水中，作用1小时后排放

D、干粉按有效氯50mg/L用量加入污水中，作用2小时后排放

E、干粉按有效氯100mg/L用量加入污水中，作用30分钟后排放

Two users share the same Windows 7 computer. The first user creates a document intended to be used by both users, and then logs off. The second user logs on and types the name of the document in the Start menu, but the document is not found. Which of the following is the problem?（）

A、The document is set to hidden.

B、The document is locked.

C、The document was saved as a system document.

D、The document is owned by the first user.

Which of the following is the BEST way for Karen, a technician, to mitigate phishing attempts?（）

A、Installing antivirus

B、Reconfiguring the firewall

C、Changing the permissions and passwords

D、Educating the end user

Which of the following approval member groups can an organization administrator grant privileges to？（）

ApprovalGroup

Order Process

User Group

User Registration

AccessGroup

有以下程序： #include  main() { 　int k=-17;  　printf("%d,%o,%x",k,1-k,1-k); } 程序的运行结果是（　　）。

A、-17,22,12

B、-17,12,22

C、-17,-22,-l2

D、17,22,12