【单选题】某儿童认为周围世界绕着他转,月亮跟着他走;他只知道自己有个哥哥,但不知道自己就是哥哥的弟弟。该儿童心理发展所处的阶段是( )
【单选题】两个同频率正弦交流电压 u 1 、 u 2 的有 效值各为20V和30V。当 u 1 + u 2 的有效值为-10V时, u 1 与 u 2 的相位 差是 ( )
【单选题】Saving Money Where you save your money often depends on what you are saving for. If you are saving to buy a dictionary or to go to a concert, then probably keep your money somewhere in your room. If y...
B.
Putting your money in a piggy bank,
C.
Putting your money in your pocket.
D.
Putting your money in a savings account.
【单选题】SECTION B PASSAGES Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. 听力原文: A few months ago, millions of people i...
A.
One of the bridges between North and South London collapsed.
B.
The heart of London was flooded.
C.
An emergency exercise was conducted.
D.
100 people in the suburbs were drowned.
【单选题】要对演示文稿中所有幻灯片做同样的操作,一下选项正确的是______.
【单选题】两个同频率正弦交流电压u 1 、u 2 的有效值各为60 V和80 V。当u=u 1 +u 2 的有效值为140 V时,u 1 和u 2 的相位差是( )
【简答题】Time spent in a bookshop can be enjoyable. If you go to a ___36___shop, no assistant will come near to you and say “Can I help you? ” You ____37____buy anything you don’t want. You may try to ___38___...
【单选题】两个同频率正弦交流电压 u 1 、 u 2 的有 效值各为30V和50V。当 u 1 + u 2 的有效值为80V时, u 1 与 u 2 的相位 差是 ( )
【单选题】两个同频率正弦交流电压 u 1 、 u 2 的有 效值各为40V和30V。当 u 1 + u 2 的有效值为50V时, u 1 与 u 2 的相位 差是 ( )
【单选题】SECTION B PASSAGES Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. 听力原文: (11) A few months ago, millions of peo...
A.
One of the bridges between North and South London collapsed
B.
The heart of London was flooded.
C.
An emergency exercise was conducted.
D.
100 people in the suburbs were drowned.