题目内容

受精卵逐渐埋入子宫内膜的过程,称为植入。

A. 对
B. 错

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脐带中含有一条脐动脉和两条脐静脉。

A. 对
B. 错

China's major traditional festivals include _________.

A. Teachers' Day
B. Labour Day
C. National Day
D. Lantern Festival

Qingming Festival is in memory of __________ who lived in the Spring and Autumn period.

A. Qu Yuan
B. Jie Zitui
Chong Er
D. Cowherd

The Water-Splashing Festival is the _____________ New Year.

A. Dai people's
B. Miao people's
C. Hui people's
D. Bai people's