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【单选题】
We can infer from the passage that ______
A.
parents get little information about their children' s performance at school
B.
a student has to spend more than 5 periods learning lessons at school
C.
both school and parents think highly to the newsletters
D.
students with a mark above 95% might fail the exams
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举一反三
【单选题】双侧瞳孔缩小症状多见于下列的疾病是:
A.
颅内压增高、颅脑损伤
B.
颠茄类药物中毒
C.
小脑幕裂孔疝
D.
有机磷农药、氯丙嗪、吗啡等药物中毒
E.
濒死状态
【单选题】Which word does not have the speed sound /u:/?
A.
took
B.
noodle
C.
goose
D.
bamboo
【单选题】The word 'quit' in paragraph 2 is closest in meaning to( )
A.
give up.
B.
speed up.
C.
slowdown.
D.
build up.
【判断题】EPON在网络中的位置属于汇聚网。
A.
正确
B.
错误
【单选题】U10: speed
A.
意思
B.
诉说
C.
速度
【单选题】The word 'quit' in paragraph 2 is closest in meaning to( )
A.
give up.
B.
speed up.
C.
slowdown.
D.
build Up.
【简答题】P ( -2,1 )为角 α 终边上一点,则 sin α = , cos α= , tan α = 。
【简答题】P(-2,1)为角α终边上一点,则sinα=(__),cosα=(__),tanα=(__)
【简答题】如图(一),在平面直角坐标系中,射线OA与x轴的正半轴重合,射线OA绕着原点O逆时针到OB位置,把转过的角度记为α,把射线OA称为∠α的始边,射线OB称为∠α的终边。设α是一个任意角,α的终边上任意一点P(除端点外)的坐标是P(x,y),它到原点的距离是r=PO= ,那么:定义:∠α的正弦sinα= ,∠α的余弦cosα= ,∠α的正切tanα= ,根据以上的定义当α=120°时,如图(二)在12...
【简答题】如图(一),在平面直角坐标系中,射线OA与x轴的正半轴重合,射线OA绕着原点O逆时针到OB位置,把转过的角度记为α,把射线OA称为∠α的始边,射线OB称为∠α的终边、设α是一个任意角,α的终边上任意一点P(除端点外)的坐标是P(x,y),它到原点的距离是 r=PO= x 2 + y 2 ,那么定义:∠α的正弦 sinα= y r ,∠α的余弦 cosα= x r ,∠α的正切 tanα= y x ...
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