如图所示，当有电流沿逆时针方向通过线圈时，小磁针的N极将 [ ] A．向纸内偏转

某男性青年午餐后数小时出现头晕、恶心、腹痛、呕吐等症状。呕吐物接种到血液琼脂平皿培养后出现完全溶血环，金黄色菌落。培养滤液给幼猫腹腔注射4小时后出现呕吐，此病可诊断为()

A．金黄色葡萄球菌引起的食物中毒

B．产气荚膜梭菌引起的食物中毒

C．肠炎沙门菌引起的食物中毒

D．肉毒梭菌引起的食物中毒

E．鼠伤寒沙门菌引起的食物中毒

图示两物体重力的大小分别为P和Q，用绳子连接，绳子跨过一滑轮，滑轮半径为r，其重力不计。开始时两物体的高度差为c，且Q＞P，则由静止释放后，两物体达到相同高度时所需的时间为（）。

A.A

B.B

C.C

D.D

根据所给词的适当形式填空。

1. Dr. Brown is ____________ (success) than he was ten years ago.

2. It is thoughtful of you ____________ (play) the CDs for us.

3. —Did you go out that morning? —No, never. I ____________(write) my composition in my

    room the whole morning.

4. ____________ (Luck), Uncle Zhang found a new job within one week.

5. —How clean the room is! —Who ____________ (clean) it?

6. I have had my bike ____________ (mend) since three days ago.

7. It's ____________ (fair) for me to do the whole work alone.

8. Blue will make you ____________ (feel) calm.

9. ____________ (wear) blue clothes or sleeping in a blue room is good for the mind and body.

10. I hope we can make a ____________ (decide) today.

“累计折旧”和“坏账准备”等反映资产价值损耗或损失的账户，属于损益类账户。（ ）

当吸附塔发生压力严重不平衡时，旋转阀必须离座。（）