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【简答题】
Neither John his father was able to wake up early enough to catch the morning train. A: or B; nor C; but
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【单选题】It remains a mystery that how the ancient Egyptians could ___________ the huge stone blocks to build those pyramids.
A.
hoist
B.
tow
C.
hurl
D.
toss
【简答题】内容: 在工作中寻找十五个折价优待的案例,每种方式三个。 要求: 1 、四个同学一组; 2 、形式: PPT 3 、图文并茂,文字解说
【简答题】求下列三角函数值: (1)sin ; (2)tan(-1560 ° ) ; (3)cos
【简答题】求下列三角函数值 （1）sin（-1380°）cos1110°+cos（-1020°）sin750°； （2）2sin 5π 4 -cos4π+tan（- π 4 ）．
【判断题】Egyptians pay no attention to tips at work and is not a part of their daily income.()
A.
正确
B.
错误
【单选题】The ancient Egyptians are supposed ______ rockets to the moon.
A.
to send
B.
to be sending
C.
to have sent
D.
to have been sending
【单选题】The ancient Egyptians are supposed _________ rockets to the moon.
A.
to be sending
B.
to send
C.
to have sent
D.
to have been sending
【简答题】如何改变一个闭合回路中的磁通 量?具体有哪些方法?
【简答题】用诱导公式求下列三角函数值：（1） sin(- 17π 6 ) （2） cos(- 13π 4 ) ．
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