A:There will be a garden next year.
B:I will swim tomorrow.
C:Students will study online at home in the future.
著名数学家华罗庚说时间是由分秒积成的,善于利用零星时间的人,才会做出更大的成绩来。”这启示我们( )
—It's too complex, I think.
—______. So we'd better make it easier for students to get involved.
已知储氢装置的电流效率 η=生成目标产物消耗的电子数转移的电子总数× 100%,下列说法错误的是( )