不是生活饮用水水质卫生规范制定的依据的是()。
A.毒理学指标
B.感官性状指标和一般化学指标
C.细菌学指标
D.放射性指标
E.流行病学指标
参考答案:E
计算:4-2=______.
在下列各句的空格内填上一个适当的单词,该词的首字母已给出。
小题1: Yesterday we didn’t go swimming but went boating i____________.
小题2: Bad luck! The girl fell off the bike and hurt h .
小题3: The boy felt s in class this morning ,because he stayed up late last night
小题4: If you have got any problems, you can talk to him because he is a good l________.
小题5: He r to give me a hand when I was in trouble. I was really angry with him.