【单选题】以下说法不正确的是
A.
腐蚀性刺激药品如强酸,强碱,浓氨水等取用时尽可能戴上橡皮手套和防护眼镜,搬运时必须一手托住瓶底,一手拿住瓶颈。
B.
稀释硫酸时,必须在耐热容器内进行,并且在不断搅拌下,慢慢地将浓硫酸加入水中,在溶解氯化钠,氢氧化钠,氢氧化钾等发热物质时,也必须在耐热容器中进行。
C.
试验药剂容器都要有标签,对分装的药品在容器标签上要注明名称、规格、浓度;无标签或标签无法辨认的试剂都要当成危险物品重新鉴别后小心处理。不可随便乱扔,以免引起严重后果。
D.
丙酮,CH3COCH3为最简单的饱和酮,主要是对中枢神经系统的抑制、麻醉作用,高浓度接触对个别人可能出现肝、肾、和胰腺的损害。由于其毒性低,代谢解毒快,生产条件下急性中毒较为少见。急性中毒时可发生呕吐、气急、痉挛甚至昏迷。
【简答题】从腐蚀的角度来看,软水虽不易结垢,但其腐蚀性较强。因此,循环水中()的低限不宜()。从结垢的角度来看,钙离子是循环水中最主要的成垢阳离子。因此,循环水中钙离子浓度也不宜过高。在投加()的情况下,钙离子浓度的高限不宜()。如果以碳酸钙计的话其上下限是()。
【单选题】影响肛门栓剂直肠吸收的因素, 不包括( )
【判断题】利率市场化是指中央银行完全放弃利率管理,金融资产的交易利率由金融市场的资金供求关系决定。
【判断题】利率市场化是指中央银行完全放弃利率管理,金融资产的交易利率由金融市场的资金供求关系决定。()
【简答题】阅读理解。 Bill Gates was born in 1955. He grew up in Seattle, Washington. When he was young, he was good at science and maths. And he wanted to be a scientist. Bill started to play with computers when he ...
【简答题】Compound Dictation He’s the most 1. _______________ businessman in the world. Many 2. _______________ have been written about how he has dominated the revolution in personal 3. _______________. But we...
【简答题】He's the most __1_____ businessman in the world. Many __2_____ have been written about how he has dominated the revolution in personal ____3____ . But we know little about him as a person. Here's a ...
【简答题】飞机要定期清洗,停放时加盖________,以防风沙雨雪侵蚀。