【简答题】活塞的结构:( )活塞头部、( )活塞销、 活塞销锁圈等组成
【单选题】Ann has a fine reputation for being an old hand ______ cooking Italian food.
【判断题】发酵乳加工常用的发酵剂有嗜热链球菌、保加利亚乳杆菌、双歧杆菌。
【判断题】外汇银行虽然是外汇供求的主要中介人,但不自行对客户买卖外汇。
【简答题】确定宜耕期的方法_________________。
【单选题】Ann has a fine reputation for being an old hand ____ cooking Italian food.
【单选题】Ann has a fine reputation for being an old hand ______ cooking Italian food.