皮皮学，免费搜题
登录
搜题
【简答题】
已知m、l是直线，α、β是平面，给出下列命题：①若l垂直于α内两条相交直线，则l⊥α；②若l平行于α，则l平行于α内所有的直线；③若m?α，l?β且l⊥m，则α⊥β；④若l?β且l⊥α，则α⊥β；⑤若m?α，l?β且α ∥ β，则l ∥ m．其中正确命题的序号是 ______．
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】听力原文：W: Professor, a few of us at the hack didn't get your copy of reading assignment. M: Well, there're only 38 names on my clam list. And I didn't bring any spare copies. Q: What do we learn from th...
A.
Some students at the back cannot hear the professor.
B.
The professor has changed his reading assignment.
C.
Some of the students are not on the professor's list.
D.
The professor has brought extra copies of his assignment.
【单选题】有一面值为1 000元的债券,期限5年,票面利率为8%,每年支付一次利息,到期还本。假设贴现率为6%,如果每年付息一次,其价值为( )。
A.
1 084.29
B.
1086.29
C.
1088.29
D.
1090.29
【单选题】听力原文：W: Professor Newman, a few of us at the hack didn't get a copy of your reading assignment. M: Well, there are only thirty-eight names on my class list, and I didn't bring any spare copies Q: What...
A.
Some students at the back cannot hear the professor.
B.
The professor has changed his reading assignment.
C.
Some of the students are not on the professor's list.
D.
The professor has brought extra copies of his assignment.
相关题目：