如图所示，物体M在向左下方的推力F作用下，在水平地面上恰好做匀速运动，则推力F和

Man: I’m frustrated. We’re supposed to do our assignment on the computer, but I have difficulty getting access to the computers in the library.
Woman: I understand the way you feel. I’m looking forward to the day when I can afford to get my own.
Question: What does the woman mean().

A. She can’t finish her assignment, either.

B. She can’t afford a computer right now.

C. The man can use her computer.

D. The man should buy a computer right away.

特洛伊木马攻击的威胁类型属于______。

A．授权侵犯威胁

B．植入威胁

C．渗入威胁

D．旁路控制威胁

驱蛔虫的药是（）。

A．甲硝唑

B．枸橼酸乙胺嗪

C．枸橼酸哌嗪

D．奎宁

E．毗喹酮

哪些抗生素肾脏毒性较小()

A．青霉素

B．先锋霉素

C．庆大霉素

D．红霉素

E．卡那霉素

挖土的测量放线：挖土过程中配合水准测量，用木楔或竹签在基槽侧壁上钉出距槽底（）的控制标高点，用于清槽找平等的控制。

A.30cm

B.50cm

C.80cm

D.100cm