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【单选题】
以下程序实现了判断键盘输入的两个字符串是否相等。如果两个字符串相等,则输出"相等",否则,输出“不相等”。请选择正确的答案将程序填写完整。 str1 = input("请输入字符串1:") str2 = input("请输入字符串2:") if _____________: print("相等") else: print("不相等")A.
str1 = str2
B.
str1 == str2
C.
str1 != str2
D.
str1 <> str2
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皮皮学刷刷变学霸
举一反三
【单选题】连杆机构行程速比系数是指从动杆反、正行程 。
A.
瞬时速度（角速度）的比值
B.
最大速度（角速度）的比值
C.
平均速度（角速度）的比值
D.
最小速度（角速度）的比值
【简答题】What earl you infer from the last sentence?
【单选题】Jiff received a early settlement discount of $15 from a credit supplier and the discount has been debited to the discounts received account. How will the profit be affected as a result of this error?
A.
Overstated by $30
B.
Understated by $15
C.
Understated by $30
D.
Overstated by $15
【单选题】Jiff's cash book shows a credit balance of $50 brought down at the end of May 20X9. What does this balance represent?
A.
The total of cash paid out by Jiff in May is $50
B.
Jiff has an overdraft at the bank
C.
Jiff received cash of $50 in May
D.
Jiff has money at the bank
【多选题】（135—139题共用备选答案）
A.
色氨酸
B.
组氨酸
C.
赖氨酸
D.
酪氨酸
E.
蛋氨酸 135.半必需氨基酸是 136.粮谷类食品应强化的氨基酸是 137.大豆的最限制性氨基酸是 138.除8种必需氨基酸外，婴儿还必需 139.在体内可转化为尼克酸的氨基酸是
【单选题】Russ and Earl were auto mechanics ______ the same pay, but Earl had more ambition. [ ]
A.
earned
B.
to have earned
C.
to earn
D.
earning
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