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0G的两道语法题，谁能帮忙解答下？
有两道OG题，想了半天还是没想明白，虽然有问题解析，还是不明白，汗~~~
1、Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.
A、acting as sentinels and to sound
B、acting as sentinels and sounding
C、to act as sentinels and sound
D、to act as sentinels and to sound
E、to act as a sentinel sounding
答案B中，这几个分词倒底是怎么并列的？是defending、acting 、 sounding、scouting并列吗，那中间可以有两个AND 吗？
2、12. Formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses, because they are growing and are seldom in equilibrium.
A、Formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses, because they are growing and are seldom in equilibrium.
B、Because they are growing and are seldom in equilibrium, formulas for cash flow and the ratio of debt to equity do not apply to new small businesses in the same way as they do to established big businesses.
C、Because they are growing and are seldom in equilibrium, new small businesses are not subject to the same applicability of formulas for cash flow and the ratio of debt to equity as established big businesses.
D、Because new small businesses are growing and are seldom in equilibrium, formulas for cash flow and the ratio of debt to equity do not apply to them in the same way as to established big businesses.
E、New small businesses are not subject to the applicability of formulas for cash flow and the ratio of debt to equity in the same way as established big businesses, because they are growing and are seldom in equilibrium.
答案D 我觉得也有问题，这里them不也是指代不清吗？
唔，搞不懂~~
大家帮帮我，谢谢！[em00][em00][em00] |
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