Isogonic lines are lines on a chart indicating （）. ["points of equal variation","points of zero variation","the magnetic latitude","magnetic di"]
有休眠作用的果蔬是（）。 ["青菜","芹菜","洋葱","番茄"]
The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned. ["to a great extent","on a great extent","on mainly","on only"]
对果蔬呼吸作用影响不大的因素是（）。 ["温度","湿度","含氧量","二氧化碳含量"]
下列（）批次状态为代发业务的合规状态。 ["交易完成","批次结束","批次取消","交易已收费","正在交易","代发已余款退还","交易部分成功"]
腔肠动物有两种基本形式：（）和（）。
