水泵拆卸前，必须做到二级隔离，挂警告牌。

某工厂职工口腔健康调查资料显示，牙周病患者疾病状况不容乐观，厂医院口腔科计划开展如下口腔保健措施

对于CPITN计分为2的职工，采取（）

A.有效刷牙

B.牙周洁治

C.使用牙间清洁器

D.龈下刮治

E.口腔健康教育

麻醉后出现中毒反应的原因是：（）

A.个体差异

B.血液循环中局麻药浓度过高

C.麻醉后出现皮疹、结膜充血、面部浮肿

D.手术刺激强弱

E.神经损伤

But for the fact that China ____ also affected by the global economic crisis, we ____ fewer unemployed workers now.

A．is; would have

B．were; would have

C．was; would have had

D．is; would have had

按宗法制的规定，下列在相关范围内一定能成为大宗的是（）

①周王室——周王正妻所生之子②周王室——周王嫡长子

③诸侯国——诸侯嫡长子④卿大夫封地——卿大夫嫡长子

A.①②③④

B.①②③

C.②③④

D.②③

Questions 16 to 20 are based on the following talk.

A. Even strangers to England have a clear vision about a traditional British breakfast.
B. A traditional British breakfast is not nourishing and so is added with more protein.
C. The traditional British breakfast at a greasy caré is less than 50% the atmosphere.
D. The traditional British breakfast is getting more popular in London.