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【单选题】
1950 年,美国国会通过“中国地区援助法案”修正案,允许中国留学生就学期间和毕业以后在美国工作。1953年8月,美国总统签署“难民解救 法案”,允许至少一部分留在美国的中国留学生从学生身份转为永久居民。这些法案的出台表明A.
．科技革命促使美国招揽中国人才
B.
．美国对新中国进行科技封锁
C.
．祖国强大提升了留美学生的地位
D.
．美国向新中国释放外交善意
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【简答题】QRS电轴一般采用心电轴与____导联正侧段所构成的夹角来表示平均心电轴的偏移方向,并规定I导联正(左)侧端为____o(填入阿拉伯数字),右(负)侧端为____o(填入阿拉伯数字),。
【单选题】Which of the following statements is true regarding simple sort techniques?
A.
exchange sort if frequently referred to as a bubble sort.
B.
exchange sort is the least expensive.
C.
if random data are in an array that is to be sorted ,an insertion sort will give then best performance for large elements with small sort items.
D.
both insertion sort an selection sort require O(n) moves.
【单选题】Which of the following statements is true regarding simple sort techniques?
A.
Exchange sort is frequently referred to as a bubble sort.
B.
Exchange sort is the least expensive.
C.
If random data are in an array that is to be sorted, an Insertion Sort will give the best performance for large elements with small sort items.
D.
Both Insertion Sort and Selection Sort require O(n)moves.
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