颐和园中,万寿山和昆明湖之间的长廊于()年被认定为最长的长廊,列入“吉尼斯世界记录”。
A.1984
B.1988
C.1992
参考答案:C
It is _____ you deal with difficulties that shows _____ you are really like.
A.what; what
B.how; that
C.which; how
D.how; what
极地卫星(轨道平面经过地球的南北两极)圆轨道的半径为r,周期为2h.赤道卫星9轨道平面为赤道平面)圆轨道半径为4r.则两卫星从距离最近到下一次最近的时间为( )
A.167h
B.14h
C.16h
D.30h