【单选题】Why does the author mention the history of tape recorders in the first paragraph?
A.
To inform. readers of new inventions.
B.
To lead into his following suggestion.
C.
To give an example of his suggestion.
D.
To show the importance of tape recorders
【简答题】电镜下毛细血管分几类,各有何主要特点 ?
【单选题】Why does the author mention the Massachusetts Bay Colony?
A.
The first lantern wicks were developed there.
B.
It was tile headquarters of the United States Lighthouse Board.
C.
Many of the tallest lighthouses were built there.
D.
The first lighthouse in North America was built there.
【单选题】今欲用H3PO4与Na2HPO4来配制pH = 7.2的缓冲溶液,则H3PO4与Na2HPO4物质的量之比n(H3PO4)∶n(Na2HPO4)应当是( ) (H3PO4的pKa1~pKa3分别是2.12,7.20,12.36)
【单选题】自然流产的发生率占全部妊娠10%--15%左右,其中( )%以上的为早期流产。
【单选题】脊髓损伤水平的评定,正确的是
A.
可主动屈肘时,伸腕,但不能伸直肘关节损伤水平定位C4
B.
确定损伤平面时,该平面关键性的肌肉肌力必须≥4级
【单选题】下列文件中,数据量最小的是 ()
A.
一个分辨率为1024×768,颜色量化位数24位的BMP位图文件
【单选题】下列文件格式中,数字音频文件数据量最小的是()
【单选题】Why does the author mention the 'mother' and 'father' in the first paragraph?
A.
to present the background of statistics in a humorous and understandable way
B.
to point out that parents can teach their children statistics
C.
to explain that there are different kinds of variables
D.
to introduce inferential statistics
【单选题】脊髓损伤水平的评定,正确的是
A.
可主动曲肘,伸腕,但不能伸直肘关节,损伤水平定位C4
B.
确定损伤水平时,该节段关键性的肌肉肌力必须≥4级