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【简答题】
调节红细胞生成的激素主要有____和____。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】They’re late. The film _____ for 5 minutes.
A.
has begun
B.
has started
C.
has been on
D.
start
【单选题】They’re late. The film _______ for half an hour.
A.
Has begun
B.
has been on
C.
started
D.
has started
【单选题】They are late. The film __________ for five minutes.
A.
has begun
B.
has started
C.
has been on
D.
began
【单选题】If we ______ late, they ______ what has happened.
A.
are, will be wondering
B.
were; wondered
C.
will be late; will be wondering
D.
are; are wondering
【多选题】气相色谱分析法在药品质量分析中的应用包括( )
A.
药材、饮片及制剂中部分农药残留量的检测
B.
中药材中二氧化硫含量测定
C.
酊剂（如藿香正气水、十滴水等）中甲醇、乙醇含量测定
D.
药品中有机溶剂残留量检测
【简答题】No one except two students _____ the meeting. [ ] a. has been late for b. have been late for c. was late for d. were later for
相关题目：
【单选题】They’re late. The film _____ for 5 minutes.
A.
has begun
B.
has started
C.
has been on
D.
start