皮皮学，免费搜题
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【判断题】
必要条件的假言推理中否定前件就要否定后件，肯定后件就要肯定前件。()A.
正确
B.
错误
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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】In the 1950s in the USA, most families had just one phone at home, and wireless phones _______ yet.
A.
haven’t invented
B.
haven’t been invented
C.
hadn’t invented
D.
hadn’t been invented
【单选题】What is the cultural background of women schooling in the 1950s in the US? All are true except ___________.
A.
To awaken students' self-consciousness and guide them in seeking their true selves.
B.
American society in the 1950s was geared toward the family.
C.
The dominant ideologies of the middle class for women are to become good wives and mothers.
D.
The related curriculum is to make them more attractive in the marriage market.
【单选题】组成血浆脂蛋白的脂类主要包括:
A.
甘油三酯、磷脂、游离脂肪酸和胆固醇
B.
甘油三酯、磷脂、游离脂肪酸和胆固醇酯
C.
甘油三酯、胆固醇、游离脂肪酸和胆固醇酯
D.
甘油三酯、磷脂、胆固醇及其酯
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