Kober反应比色法测定炔雌醇片的含量
A.玻璃吸收池B.石英吸收池C.样品室D.低荧光的玻璃样品池E.石英管
参考答案:A
Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die. Many people don’ t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather. Our body is (49) water, about 65% to 75%, ff we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.
[A] much [B] enough [C] more
临时用地的使用期限一般不得超过( )年。
A.5
B.4
C.3
D.2