【单选题】The Mississippi River which is over 2300 miles long is the second-longest river in the United States. (单选题)
A.
The Mississippi River which is over 2300 miles long is the second-longest river in the United States. (No commas)
B.
The Mississippi River, which is over 2300 miles long is the second-longest river in the United States.
C.
The Mississippi River which is over 2300 miles long, is the second-longest river in the United States.
D.
The Mississippi River, which is over 2300 miles long, is the second-longest river in the United States.
【单选题】Which of following description related to “Kennedy’s moon-shot speech” is NOT true?
A.
Kennedy is US President John F. Kennedy.
B.
The speech was held on May 25, 1961.
C.
Kennedy challenged Congress and the American people to put a man on the moon
D.
Kennedy was sent to the moon.
【单选题】The place where a channel moves from along one bank of the river over to the other bank of the river is called a().
【简答题】共阳极的数码管输入信号的有效电平是 [填空(1)] 电平。
【单选题】系统性能调整的手段包括______。 ①数据查询调整与优化 ②索引调整 ③数据库模式调整 ④DBMS和操作系统参数调整 ⑤数据库应用程序优化 ⑥硬件配置调整和升级 A) ①②④⑤⑥ B) ①②③⑤⑥ C) ②③④⑤⑥ D) ①②③④⑤⑥
【单选题】听力原文: Lee Harvey Oswald, a 24-year-old former Marine, was being transferred from police headquarters to the county jail. The man accused of murdering the US President, John F. Kennedy, has himself bee...
【简答题】There are strange similarities in the life of John F. Kennedy and the life Abraham Lincoln. For example, Kennedy became a president in 1960, while Lincoln elected in 1860.This was exactly one hundred ...
【简答题】共阳极的数码管输入信号的有效电平是 [填空(1)] 电 平。A. 低