期货套利交易者是指单向头寸拥有者。 ( )
参考答案：错
We enjoy different kinds of sports, ________from swimming to riding a horse. [ ]
A. impressing
B. panicking
C. varying
D. shooting
桩基遇雷雨、六级及以上大风等恶劣天气应停止作业，并采取加设揽风绳、（）等措施。
