《化妆品卫生标准》中规定的限用物质是（） A.化妆品不得对皮肤和黏膜产生刺激和损伤作

有两根长直导线a、b互相平行放置，如图所示为垂直于导线的截面图．在图示的平面内，O点为两根导线连线的中点，M、N为两根导线附近的两点，它们在两导线连线的中垂线上，且与O点的距离相等． 若两导线中通有大小相等、方向相同的恒定电流I，则关于线段MN上各点的磁感应强度的说法中正确的是（　　）

A．M点和N点的磁感应强度大小相等，方向相同

B．M点和N点的磁感应强度大小不等，方向相反

C．在线段MN上各点的磁感应强度都不可能为零

D．在线段MN上只有一点的磁感应强度为零

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

If you feel stressed by responsibilities at work, you should take a step back and identify (识别) those of   61  (great)and less importance. Then, handle the most important tasks first so you’ll feel a real sense of   62  (achieve). Leaving the less important things until tomorrow   63  (be) often acceptable.

Most of us are more focused   64   our tasks in the morning than we are later in the day. So, get an early start and try to be as productive   65   possible before lunch. This will give you the confidence you need to get you through the afternoon and go home feeling accomplished.

Recent   66  (study) show that we are far more productive at work if we take short breaks   67  (regular). Give your body and brain a rest by stepping outside for   68   while, exercising, or dong something you enjoy.

If you find something you love doing outside of the office, you’ll be less likely   69  (bring) your work home. It could be anything-gardening, cooking, music, sports—but whatever it is,   70  (make) sure it’s a relief from daily stress rather than another thing to worry about.

65（）

关于不完全性子宫破裂，下述恰当的描述是（）

A.子宫肌层部分性破裂，宫腔与腹腔相通

B.子宫肌层全部或部分破裂，浆膜层尚未穿破

C.胎心正常

D.胎儿及附属物在腹腔内

E.子宫肌层全部或部分破裂，浆膜层尚未穿破，宫腔与腹腔未相通

试述眼球化学伤的临床表现。

国库使用的记账凭证是根据原始凭证或原始凭证汇总表，按业务内容和应用的会计科目，加以归类整理而编制的，是登记账簿的依据，符合记账凭证要求的其他凭证，也可代替记账凭证。