铺设22-24kg/m钢轨，使用道钉的长度是（）毫米。 A.97 B.112 C.1

单词拼写。

1.Have you ever seen the famous ________(喜剧) Twelfth Night by Shakespeare ?

2.We are not allowed to________ (靠近) the forbidden area.  

3.He has got a ________ (独特) opportunity to study abroad.  

4. Can you understand this passage without __________（解释）?

4. The ________ (发现) of radium has helped many people.    

6. This road is about 1,000 meters in _________（长）.

7. The professor will fly ________(直接) to Tokyo tomorrow morning.

8. Hard work leads to success and ________（失败）lies in laziness.

9. For _____ (各种各样)reasons, he had to leave his homeland.

10. Seconds count in_____ (紧急情况) and knowing what to do can mean the difference

between life and death.        

对肝源性低血糖描述，正确的是（）

A.服糖后2h血糖可降至正常

B.服糖后2h血糖不能降至正常

C.尿糖不会出现阳性

D.空腹血糖低于正常

E.服糖后血糖峰值提前出现并超过正常

14岁以下的人口在总人口中所占的百分比是指

A．老年人口系数
B．少年人口系数
C．老龄化指数
D．总抚养比
E．老年人口抚养比

下列作物中经济系数最低的是（）

A.小麦

B.玉米

C.甘薯

D.大豆

窝洞充填后立即产生咬合疼痛的原因是（）

A.可复性牙髓炎

B.有悬突

C.咬合高点

D.材料强度过高

E.充填材料未凝固