We need to finish making if we want to be for our trip tomorrow. (prepare)
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The biographer wrote about the actor’s rise to and fortune. (fame)
My sister is about baking, which is her . (passion)
唐氏综合征是()染色体增加一条,导致的染色体变异疾病。
A. 13号
B. 18号
C. 21号
D. 23号
家蚕的性别决定模式是()型。
A. XY
B. XO
C. ZW
D. 单倍体