Among the many open research questions on MTBE are how it is metabolized, ______

游客2025-05-09 36

问题 Among the many open research questions on MTBE are how it is metabolized, ______the levels of exposure in the general population are.

选项 A、but what
B、and what
C、but how
D、and why

答案 B

解析需要 what 从句结构。

转载请注明原文地址:http://tihaiku.com/zcyy/4068243.html

相关试题推荐

随机试题

最新回复(0)

Researchershaverecentlyfoundaconnectionbetweendiseaseandstressfulsi