I have a good teacher. She is a tall woman with black hair. She is a little fat. She has two big eyes and a small nose. She likes smiling. She is very kind and patient to us. And at the same time, she is strict in class. After class, she lik
十二届全国人大一次会议审议批准了《政府工作报告》,依法选举和决定任命了新一届国家机构领导人员。由此可见( )
①全国人大行使了决定权、任免权和监督权
②人大代表享有选举权、审议权和决定权
③全国人大决定国家的一切事务
④其他国家机关必须对人民代表大会负责
下列说法不正确的是( )
如图所示,在双缝干涉实验中,S1和S2为双缝,P是光屏上的一点,已知P点与S1和S2距离之差为2.1×10-6 m,现分别用A、B两种单色光在空气中做双缝干涉实验,问P点是亮条纹还是暗条纹?
复数z=2+i21-i(i是虚数单位)在复平面上对应的点位于( )