从如图所示水分子分解示意图中获得以下信息,其中不正确的是( ) A.水是由氢元素

题型:选择题

问题:

从如图所示水分子分解示意图中获得以下信息,其中不正确的是(  )

A.水是由氢元素和氧元素组成

B.化学反应前后元素的种类不变

C.在化学变化中,分子可分原子也可分

D.1个水分子由2个氢原子和1个氧原子构成

考点:化学反应微观示意图水的组成水的性质和用途分子的定义原子的定义
题型:选择题

化学名为5-甲氧基-2-[[(4-甲氧基-3,5-二甲基-2-吡啶基)-甲基]亚磺酰基]-1H-苯并咪唑的药物为( )。

A.雷尼替丁
B.西咪替丁
C.氯雷他定
D.氯苯那敏
E.奥美拉唑

题型:选择题

下列哪项不是肛诊的内容

A.胎方位

B.先露高低

C.是否破膜

D.宫口开大情况

E.宫缩强度

题型:选择题



Earthquakes often happen near volcanoes, but this is not always true. The centers of some are (1) . The bottom of the sea suddenly (2) . The powerful forces inside the (3) break the rocks. The coast is shaken and great waves appear. These waves travel (4) and rush over the land when they reach it. They are p enough to (5) houses and other buildings; sometimes they break (6) than the earthquake itself.
Very often fires followed the (7) earthquakes. In 1906, the great earthquake at San Francisco broke the gas-pipes. The gas (8) , and soon large numbers of fires were burning in the city. The water-pipes were also (9) ; so it was not possible to put the fires out. There was (10) . The Tokyo earthquake of (11) happened just before the middle of the day. People were (12) on their fires at that time. When the ground shook, the fires shook too. (13) were thrown on the different parts of the houses, some of which were (14) . Soon 134 fires were burning in the city. What kind of building (15) in an earthquake A building with concrete walls is perhaps the best. A (16) will make it even per. The frame holds the (17) together, and the walls do not easily fall. There is (18) of fire because concrete and steel do not burn. The Americans (19) the results of the earthquake in San Francisco, and they are convinced that this kind of building is the (20) .

题型:选择题

影响药物吸收的因素是:()

A.首过效应

B.与血浆蛋白结合

C.血脑屏障

D.胎盘屏障

E.肝脏代谢

题型:选择题

解释热带气旋与温带气旋的差异及相同点?

更多题库