写出-2m3n的一个同类项______．

苯丙氨酸脱氨酶试验阳性的细菌有（　）

A．奇异变形杆菌

B．产碱普罗威登斯菌

C．摩根摩根菌

D．阴沟肠杆菌

E．粘质沙雷菌

新生儿缺血缺氧性脑病的护理正确的是（）

A.持续高流量给氧

B.患儿取侧卧位

C.立即气管插管

D.频繁吸痰

E.禁食

第二节：语法填空（共10小题，每小题1.5分，满分15分）

Exercise is good for you, but most people really know very little about __31___ to exercise properly. So when you try, you __32___ run into trouble.

Many people believe that when specific muscles are exercised, the fat in the neighbouring area is “burned up”. Yet the truth is __33___ exercise burns fat from all over the body.

Studies show muscles which are not exercised lose their strength very quickly. To regain it __34___ (need) 48-72 hours and exercise every other day will keep a normal level of physical strength.

To lose weight you should always “work up a good sweat” when __35___ (exercise). Sweating only reduces body temperature to prevent heating. This is nothing __36___ water loss.

Walking is the best and easy-to-do exercise. ___37__ helps the circulation of blood throughout the body, and has a direct effect ___38__ your overall feeling of health. Experience says that 20 minutes’ exercise __39___ day is minimum amount. But if your breathing doesn’t return to normal state within minutes __40___ you finish exercising, you’ve done too much.

裂解气出了压缩部分后进入（），进行干燥然后进入分离系统。

A.裂解气干燥器10-A-201A/B

B.氢气干燥器10-A-301A/B

C.丙烯干燥器10-A-402A/B

D.乙烯精馏塔10-C-403

当监理机构的总监理工程师不能满足工作要求时，监理单位可( )。

A．取得业主的书面同意后再调换

B．只需口头通知业主即可调换

C．无需通知业主即可调换

D．一旦合同签订，不允许再调换总监