下列现象中不是由于光的折射现象形成的是[ ] A.透镜成像 B.色散现象 C.日

阅读理解。根据短文内容判断句子正(√)误(×)。

      Wang Bin is an accountant. He works in a bank. He helps the people use their money well. He likes working

with numbers. He goes to work by subway, but he walks home. His mother likes helping people. She is a

policewoman. She goes to work by motor cycle.

( ) 1. Wang Bin is an engineer.

( ) 2. He likes working with numbers.

( ) 3. He goes home on foot.

( ) 4. His mother is a cleaner.

( ) 5. His mother goes to work by car.

一般不用于巴比妥类药物鉴别的金属盐是

A．钢盐

B．银盐

C．汞盐

D．钴盐

E．锌盐

下面那一项不是围鳃腔具有的功能。（）

A.文昌鱼通过咽鳃裂排出的水的通道

B.生殖细胞的排出通道

C.未消化食物的排出通道

D.文昌鱼体腔的代谢废物排出通道圆口纲

下列那项不是抗原-抗体反应所应具有的特征

A．特异性结合后可立即出现可见反应

B．表面结合，也可解离

C．两者为非共价键结合

D．反应需适当的浓度比例

E．反应受电解质、酸碱度和温度的影响

用塑料(丙烯聚合物)扁条(宽6mm)编结的边条缝合的遮阳帽