如图所示,在水平轨道上的车厢里,用细线悬挂小球A,当车厢匀速运动时,悬线保持在竖

题型:选择题

问题:

如图所示,在水平轨道上的车厢里,用细线悬挂小球A,当车厢匀速运动时,悬线保持在竖直方向上,当发现悬线发生如图偏斜时,下述说法中正确的是(     )

A.车可能向右做加速运动

B.车可能向右做减速运动

C.车可能向左做减速运动

D.车可能向左做加速运动

考点:牛顿运动定律的应用
题型:选择题

Nice to meet you, Jim! It has been one year since I last ______ you.          [ ]

A. met            

B. meet          

C. meeting

题型:选择题

单词拼写。

     根据下列句子及所给汉语注释,写出空缺处各单词的正确形式。(每空只写一词)

1. The wind turned my ______ (伞)inside out.

2. Writing poetry has _____(解放) her from the boring of the daily life.

3. The attempt to save the drowning child is undoubtedly _____(高尚)

4. _______(香烟)like other tobacco products, do carry serious health effects with them.

5. Would you mind not _____(插嘴) all the time?

6.A boat of a special design has been made to fit the _____(狭窄)canals of Great Britain.

7. The sweetness of _____(胡萝卜)allows the vegetable to be used in some fruit -like roles.

8.Bombs were ____(爆炸) all around the city.

9. Santa Claus is said to come into the house through the ____(烟囱) to deliver gifts.

10. _____(喷泉)are great to look at, of course, but they can also provide other benefits.

题型:选择题

下列关于雌、孕激素的周期性变化,正确的是

A.雌、孕激素的峰值在排卵后第10天形成

B.雌激素于排卵后7~8天出现高峰

C.月经来潮时孕激素水平开始下降

D.雌激素在周期中有一个分泌高峰

E.孕激素在周期中有两个分泌高峰

题型:选择题

患者,女性,50岁,3年前在个体诊所做牙髓治疗,就诊2次,但方法不详,近3个月该牙隐痛不适、咀嚼无力,近1周症状加重,前来就诊

对诊断最有帮助的问诊是()

A.有无咬硬物史或外伤史

B.有无激发痛史

C.有无张口受限

D.有无颌面部肿胀

E.有无牙龈出血

题型:选择题

假定N、C、L分别为数值型、字符型、逻辑型内存变量。在下面的表达式中错误的表达式是______。

A.3*N

B.C-"A"

C.N=10.OL

D.C>10

更多题库