屏蔽室操作时对需要观察的部位可装活动门或开窗口,一般用()的铜丝屏蔽活动门或窗口。
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经后小腹隐隐作痛,月经量少,色淡,腰膝酸楚,头晕耳鸣,舌淡,苔薄,脉沉细。治宜()
A. 补肾养血,调经止痛
B. 补气养血,调经止痛
C. 温经养血,调经止痛
D. 行气活血,调经止痛
E. 温经扶阳,养血调经
nternational Transport Transport plays an important part in international business because goods produced have to be delivered to the buyers abroad, and the delivery of goods is to be made possible by transport services. Goods are carried by several means of transport on road or rail, by sea or air. And in recent years, combined transport which is a road-sea-rail carriage appeared. With the expansion of international trade, the container service has become popular. The use of containers provides a , highly effective form of transport . by road, rail and sea, Basically , orabout 98% of world trade is carried out by sea transport.Besides transport by sea, road, or rail, nowadays in order to speed up delivery, carriage by air international has also become popular. With the expansion of international trade, the combined transport service has become popular.
A. 正确
B. 错误
四挡自动变速器须用()个换挡阀。
A. 1
B. 2
C. 3
D. 4
下面不属于玉米土壤封闭封闭性除草剂是的()。
A. 莠去津
B. 乙草胺
C. 异丙草胺
D. 烟嘧磺隆