【多选题】Why are bat populations falling?
A.
Killed by other animals
B.
Overuse of pesticide chemicals
C.
territory being destroyed
【单选题】Why does the author mention New York City in line 6 ?
A.
To emphasize how small the population of the Pacific Islands is
B.
To emphasize the extreme distances between the Pacific Islands and other regions
C.
To note the economic ties of the Pacific Islands to other regions
D.
To note the lack of urban environments on the Pacific Islands
【单选题】辽宁省的文学创作古已有之,但形成较大影响的是抗战时期的( )
【多选题】Why are bat populations falling?
A.
Killed by other animals
B.
Territory being destroyed
【单选题】同种材质的给水聚丙烯管材与管件应采用 ( ) 连接或电熔连接,安装时应采用配套的专用的工具。
【简答题】Passage Study the following before listening. insurance n. 保险 drawback n. 缺点,不利条件 medical adj. 医学的,药的,内科的 receipt n. 收据 obtain v. 获得,流行
【单选题】当变压器铁耗为100W时,要使变压器运行效率最高,则铜耗为【 】。