【单选题】It's difficult for such a girl to swim ________ the river. [ ]
【单选题】It's difficult for him to without a car. [ ]
【简答题】观察活细胞的内部结构可选用 显微镜,观察观察细胞的形态和运动可选用 显微镜,观察生物膜的内部结构可采用 法。
【单选题】It's difficult for me to Beijing.
【简答题】完形填空。 It's difficult for doctors to help a person with a hurt brain. 1 enough blood, the brain can live only three to five minutes. Usually doctors can't fix the hurt 2 such a short time. Dr Robert Wh...
【简答题】对账簿可以按照不同的标准进行分类,将账簿分为序时账、分类账和备查账的分类标准是( )