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【判断题】
雌二醇是活性最强的内源性雌激素,但体内易代谢失活。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列使用pH试纸的方法正确的是( )
A.
将溶液倒在pH试纸上测定溶液的pH
B.
将pH试纸伸入溶液中测定溶液的pH
C.
测定前必须先用蒸馏水润湿pH试纸
D.
用胶头滴管滴1小滴待测液到pH试纸上测定溶液的pH
【简答题】企业对外发生经营业务收取款项时，应（ ）开具发票。
【单选题】What is this news mainly about?
A.
The change in the policy of insurance.
B.
The independent insurance agency market.
C.
The development of an insurance company.
D.
The worries of an insurance customer.
【单选题】What is this text mainly about?
A.
The life of people with I. Q. 's below 90.
B.
The life of people with the highest I. Q.
C.
The reason why people have different I. Q. levels.
D.
People with different I. Q. levels and the confliction among them.
【单选题】This passage is divided into three parts. Para 1 is Part I. What is the main idea for this part?
A.
the reason why the young man wanted to find a job
B.
the most important reason why he refused the job
C.
his disappointing experience to find the job
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