List three effects of smiling on health according to the text. (within 8 words)① ② ③

List three effects of smiling on health according to the text. (within 8 words)

① ② ③

正确答案：
① lowering blood pressure ② relieving stress ③ boosting happiness

第1题：

Inflation _____ the buying power of the dollar.
A: leads
B: affects
C: influences
D: effects

参考答案：B
第2题：

有如下两个列表:list1=[(2),(0),(1),(8)]list2=[(2,),(0,),(1,),(8,)]那么,type(list1[0])和type(list2[0])分别是:

Aint和tuple
Bint和int
Ctuple和tuple
Dtuple和int

正确答案：A
第3题：

以下对于列表的相关操作中哪些项有正确的输出结果？
A.＞＞＞ language = list('PHP'); ＞＞＞ language[1:] = 'ython'; ＞＞＞ print(language) ['P', 'y', 't', 'h', 'o', 'n']#B.＞＞＞ print(list('Life is short, you need Python.').count('is')) 1#C.＞＞＞ x = [2, 3, 0, 4, 1] ＞＞＞ x.sort() ＞＞＞ print(x) [0, 1, 2, 3, 4]#D.＞＞＞ words = ['Life', 'is', 'short', 'you', 'need', 'Python'] ＞＞＞ words.index('you') 4
＞＞＞ language = list('PHP'); ＞＞＞ language[1:] = 'ython'; ＞＞＞ print language ['P', 'y', 't', 'h', 'o', 'n'];＞＞＞ x = [2, 3, 0, 4, 1]＞＞＞ x.sort()＞＞＞ print x[0, 1, 2, 3, 4]
第4题：

Despite the wonderful acting and well-developed plot the _________ movie could not hold our attention.
A) three-hours B) three-hour
C) three-hours’ D) three-hour’s

选B

用破折号连接的作形容词不用复数.
第5题：

8、以下对枚举类型名的定义中正确的是
A．enum a {one=9,two=-1,three};
B．enum a={“one”, “two”, “three”};
C．enum a {“one”, “two”, “three”};
D．enum a={one, two, three};

enum a｛a1,a2,a3｝;