皮皮学，免费搜题
登录
搜题
【单选题】
采取湿棉被、湿帆布等不燃或难燃材料覆盖燃烧物灭火运用了 的原理。 A. B. C. D.A.
冷却灭火
B.
隔离灭火
C.
室息灭火
D.
抑制灭火
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】下列说法正确的是（ ）
A.
在Rt△ABC中，若tanA= 3 4 ，则a=3，b=4
B.
在△ABC中，若a=3，b=4，则tanA=15
C.
在Rt△ABC中，∠C=90°，则sin 2 A+sin 2 B=1
D.
tan75°=tan（45°+30°）=tan45°+tan30°=1+ 3 3
【简答题】Choose the right answers. A. that would suit your purpose very well B. Although costs have been rising since March C. enclose a copy of our latest illustrated catalogue and current price list D. We th...
【多选题】I ____ an illustrated supplement to our catalogue covering the latest designs which are now available from stock.
A.
enclosure
B.
exclusive
C.
enclose
D.
exclude
【单选题】I ____ an illustrated supplement to our catalogue covering the latest designs which are now available from stock.
A.
enclosure
B.
exclusive
C.
enclose
D.
exclude
【单选题】There has been an increasing demand for the items illustrated our catalogue.
A.
of
B.
in
C.
for
D.
on
【单选题】一摩托车以36km/h的 速率在地面上行驶。其轮胎与地面间的摩擦系数 为0.3 。则 摩托车在转弯时轨道的最小曲率半径为( )m。
A.
17
B.
34
C.
68
D.
136
【单选题】We are enclosing our ______ catalogue, price list giving the details you ask for.
A.
an illustrate
B.
illustrated
C.
illustrate
D.
illustrating
相关题目：
参考解析：
知识点：
题目纠错 0
发布
