【单选题】There fell a heavy snow last December, and this year ___ a good harvest.
【单选题】《林泉高致》是以下哪类画作创作的经验总结()
【单选题】在曲柄摇杆机构中,当取摇杆为原动件时 死点位置。
【单选题】在曲柄摇杆机构中,当取曲柄为原动件时, 死点位置。
【单选题】______ , we'll go out to have a picnic.
B.
When the weather is good
C.
Provide the weather is good
D.
Unless the weather is good