【单选题】下列描述微生物的特征中,不是所有微生物共同特征的()
【简答题】下列各种凭证属于外来原始凭证的是( )。
【简答题】下列各种凭证属于外来原始凭证的是( )。
【简答题】普通交流发电机一般由 、 、 、前后端盖、风扇及带轮等组成。
【单选题】What is the finding of the new study published in the journal Learning and Memory ?
A.
It is not easy to improve one’s sleep habits.
B.
It is not good for students to play video games.
C.
Students who are better prepared generally get higher scores in examinations.
D.
Making last-minute preparations for tests may be less effective than sleeping.
【单选题】下列描述微生物的特征中,不是所有微生物共同特征的是( )