将手表放在枕头下面,能够清楚地听到手表的“嘀嗒”声,这表明______.

题型:填空题

问题:

将手表放在枕头下面,能够清楚地听到手表的“嘀嗒”声,这表明______.

考点:声音的传播
题型:填空题

填词。

小题1:I can work out(算出)the math p_________.

小题2:We are students.We have a lot of h________ to do every day.

小题3:He is a cook.He works in a r__________.

小题4:Tom and I are in the same class.We are c___________.

小题5:The dress has four c__________.They are black,red,white and green.

小题6:Han Mei often ________ me ________(帮助)my English.

小题7:_________ __________ (两百)students are in this school.

小题8:The dress is too expensive(昂贵的),and I’ll _______ ________(考虑)it.

小题9:We are good friends.We often help ________ ________(互相).

小题10:She _______ _______(住在)America now.

小题11:Help ________(you),kids!

小题12:She is glad _________ (help)you.

小题13:Mr. Brown is a good teacher.We like________(he) very much.

小题14:We ar from China.We are____________(China).

小题15:How about _________(fly) kites with me?

题型:填空题

潜水艇是靠改变它受到的                    来实现潜水和上浮的.浸没在水中的潜水艇当它逐渐下潜时,受到水的压强                         ,受到水的浮力                         ,它排开的水受到的重力                        .(填“不变”、“变大”或“变小”)

题型:填空题

上述关于执行脑死亡标准的伦理意义的提法中,最易引发争议的是()

A.有利于科学地确定死亡,真正维护人的生命

B.有利于医生对病人积极抢救还是放弃治疗进行正确抉择

C.有利于节约医疗卫生资源

D.有利于公正分配医疗卫生资源

E.有利于器官移植的开展

题型:填空题

超声波探伤仪的垂直线性与确定缺陷的()有关。

题型:填空题

一般比金属物质比废金属物质导热性强,如钢材的导热性是木材的()倍.

A.1000

B.500

C.350

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