【单选题】在碘量法中,淀粉是专属指示剂,当溶液呈蓝色时,这是( )。
【单选题】Which of the following best supports the assumption that animals have emotions?
A.
What happens in their heads and hearts.
B.
How they interact with friends and foes.
C.
The odors they emit when heing with friends.
D.
The expression in their eyes while interacting with others.
【单选题】what example is mentioned in paragraph 9?
B.
Sgt. Russell's example
【单选题】What example is mentioned in paragraph 9?
B.
Sgt. Russell's example
【判断题】真空断路器触头开断时,主要依靠触头间隙介质的碰撞游离形成电弧。
【简答题】What is mentioned as an example of important matters? __________ affairs.
【判断题】真空断路器触头开断时,主要依靠触头间隙介质的碰撞游离形成电弧。()