闭袢性肠梗阻的特点是（）
A.疼痛为阵发性剧痛
B.肠鸣音高亢时，有高调金属音
C.呕吐频繁
D.腹部有不对称隆起
E.可排出黏液血样便
参考答案：D
______ about the missing Beijing-bound Malaysian flight that he decided to look for more information about it.
A．So curious he was
B．So curious was he
C．Such curious he was
D．Such curious was he
防水砂浆养护时间应掌握在水泥砂浆______，在表面呈灰白色时，就可以进行养护。洒水养护时，一开始______，最后用喷壶慢慢地洒水，使水能被砂浆所吸收。待砂浆达到一定强度后______。
