组装单滚筒采煤机时，应保证采煤机的截割部在采煤机（） A.上端 B.下端 C.中部

要设置( )个疏散指示灯和应急照明灯。

A．4，4

B．4，3

C．3，4

D．3，3

浅表性胃炎肉眼所见主要是（）

A.胃黏膜薄而平滑

B.胃黏膜皱襞变浅，几乎消失

C.透过胃黏膜可见黏膜下血管

D.胃黏膜失去正常光泽而发灰

E.胃黏膜可见点状出血或糜烂

根据短文内容及首字母提示补全单词

Dogs are good pets. They are very f__小题1:____ to people and very beautiful. too. Most dogs get on very well with c_小题2:____and their parents. Others are good watch-dogs because they b__小题3:__ loudly when a stranger arrives. When you buy a dog. an important thing to think about is its s __小题4:____--- buy a small dog if your home is small and a bigger one if y___小题5:__is larger. Many people don’t know how much to feed their dogs. Dogs eat a___小题6:___ everything. They like meat. rice and lots of other things. You can buy lots of food made for dogs in s___小题7:_____. Don’t let your dog eat too much. F___小题8:__it only once a day. Always get w___小题9:___  for your dog. It can get thirsty(渴) very quickly. Remember that dogs need e___小题10:_____. You should take it for a walk every day.

下列物质中，均直接由原子构成的是：①干冰晶体；②二氧化硅；③水蒸气；④金刚石；⑤单晶硅；⑥白磷；⑦硫磺；⑧液氨；⑨钠和氖晶体

A．②④⑤

B．②③④⑤⑨

C．②③④⑤

D．②④⑤⑥⑦⑨

张某，男，68岁，因肺炎用抗生素连续治疗，近日发现口腔黏膜有白色附着物，用棉签拭去附着物可见出血，考虑口腔病变是由于

A．维生素缺乏
B．凝血功能障碍
C．绿脓杆菌感染
D．病毒感染
E．真菌(霉菌)感染