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问题 选择题

下列说法正确的是（　　）

A．胶体的本质特征是丁达尔效应

B．胶体不均一、不稳定

C．黄河入海口处三角洲的形成与胶体性质有关

D．溶液是呈中性的，胶体是带电的

答案

A．胶体的本质特征是分散质粒子直径介于1-100纳米之间，故A错误；

B．胶体均一、稳定、透明，故B错误；

C．江河中的泥沙属于胶体分散系，江河入海口三角洲的形成与胶体的聚沉性质有关，故C正确；

D．溶液和胶体都不带电，是中性的，故D错误．

故选C．

单项选择题 A1型题

下列各项，属于中度烧伤的是（）

A.总面积在31％～50%

B.三度烧伤面积在11％～20%

C.二度烧伤面积在10%～29%

D.二度烧伤面积在10%以下

E.小儿三度烧伤面积在5%～10%
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填空题



China is to send its top negotiator on North Korea’s nuclear program to Pyongyang (36) amid international concern over the launch of (37) .
While the (38) and its ally Japan push for (39) against North Korea, China is (40) , not sanctions.
Also, the (41) to Japan says sanctions on North Korea will (42) efforts to bring the secluded state back to (43) on its nuclear program.
North Korea (44) the six-party talks in (45) after Washington imposed financial sanctions for alleged counterfeiting and (46) activities.
A broadcast on North Korean State Television (47) the missile tests, in what it called a "successful (48) ".
It said North Korea will take action against anyone who (49) them.
The Minister is reported to have told a (50) that the missile launches were (51) because of America’s sanctions against Pyongyang.
North Korea remains (52) in the face of international condemnation and has warned (53) could be carried out.
UN Security Council members will (54) discussions tonight on whether a (55) condemning the missile launches should call for sanctions.
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