If you want to know how birds are endangered and how they should be protected, which chapter would you refer to
A. Chapter ⅩⅠⅤ
B. Chapter ⅩⅢ
Chapter ⅩⅤ
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I ______already ______three dishes, shall I finish washing, mum
A. had... broken
B. have... broken
C. have... break
国家《药品卫生标准》中规定，含生药原粉的片剂含细菌总数不超过
A. 100个/g
B. 1000个/g
C. 10000个/g
D. 50000个/g
E. 100000个/g
X线照片影像的5大要素不包括
A. 密度
B. 对比度
C. 宽容度
D. 锐利度
E. 颗粒度
32（）
A. time
B. energy
C. interests
D. fun
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