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【多选题】
安全网是用来防止人、物坠落，或用来避免、减轻坠落及物击伤害的网具。安全网一般由（ ）等构件组成。A.
网体
B.
C.
系绳
D.
扣件
手机使用
分享
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新浪微博
分享QQ
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反馈参考答案：
举一反三
【单选题】III子宫脱落是指
A.
子宫下降，宫颈外口距处女膜缘<4㎝
B.
宫颈外口已达处女膜缘
C.
宫颈脱出阴道口外，宫体在阴道内
D.
宫颈及部分宫体已脱出阴道口外
E.
宫颈与宫体全部脱出阴道口外
【单选题】The passage would most likely be found in a textbook on which of the following subjects?
A.
Astronomy.
B.
Botany.
C.
Geology.
D.
Chemistry.
【简答题】如图，小亮在太阳光线与地面成35°角时，测得树AB在地面上的影长BC＝18m，则树高AB约为 m（结果精确到0. 1m）
【简答题】设△ABC的三个内角A，B，C所对l9边分别为4，b，c，且a=60cm，b=50cm，A=38°，求c（精确到0.lcm，计算中可以应用cos38°=0.7880）
【简答题】Like a scene out of a reality show or a Disney movie, Southgate, Mich., ager Ashley Qualls' moment has arrived. She may not have an MBA, a high-school diploma, or even a driver’s license yet, but ...
【简答题】（A类）如图1，在与旗杆AB相距20米的C处，用高1.20米的测角仪测得旗杆顶端B的仰角α=30度．求旗杆AB的高（精确到0.1米）． （B类）如图2，在C处用高1.20米的测角仪测得塔AB顶端B的仰角α=30°，向塔的方向前进20米到E处，又测得塔顶端B的仰角β=45度．求塔AB的高． （精确到0.1米）．我选做______类题，解答如下：
【单选题】Which of the following subjects are NOT offered to elementary school students in the US?
A.
Mathematics and languages.
B.
Politics and business education.
C.
Science and social studies.
D.
Music and physical education.
【简答题】scale with which we are comparing our subjects provides an' effective' or' fair' comparison.
【单选题】Which of the following subjects are NOT mentioned as one that children study for experience?
A.
Drama.
B.
Social studies.
C.
Economy.
D.
Sociology.
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