斜插在水中的筷子“变弯了”，这是由于光的哪种现象造成的？
参考答案：
斜插在水中的筷子“变弯了”，这是由于光的折射造成的。
China is now the third country to conduct spacewalk, the other two _______ that are the former Soviet
Union and the US.
[ ]
A. to achieve
B. having achieved
C. to have achieved
D. achieving
《瑜伽经》记载：当生命之气在中经里长顺流通时，心灵就会产生一种稳定感。
