In the production of male gametes,which of the following cells remains dormant for 12 years?
A、Primordial germ cell
B、Primary spermatocyt
C、Secondary spermatocyte
D、Spermatid
A、Primordial germ cell
B、Primary spermatocyt
C、Secondary spermatocyte
D、Spermatid
A、Mitochondrion
B、Nucleus
C、Soluble cytoplasm (cytosol)
D、Rough endoplasmic reticulum
E、Smooth endoplasmic reticulum
A、Its effect on organisational communication
B、Its relevance to business objectives
C、The fact that it does not relate to individuals' wage or salary grades
D、Its effect on team motivation
A、头
B、头脑
C、首脑
D、每人
A、The cell cycle and cell differentiation is positive related.
B、The cell cycle and cell differentiation is negative related.
C、The cell cycle and cell differentiation is not directed related.
D、The relationship between cell cycle and cell differentiation is random.
2H+(aq)+2e→H2(g)
Zn(s)→Zn2+(aq)+2e
A、The flowers should be given wrapped.
B、German people prefer an even number of flowers
C、German people don't like number "13", so we should avoid number "13" when buying flowers.
D、You can give any types of flowers as gift in Germany.
A、20 million
B、35 million
C、100 million
D、350 million
A、40,000
B、35,000
C、480
D、48
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