【单选题】膜片弹簧:既起到压紧弹簧的作用又起到( )的作用。
【单选题】These hamburgers ______ nice, so they have all ______ out.
【判断题】离合器的膜片弹簧既起压紧装置的作用,又起到分离杠杆的作用。
【判断题】一个蛋白质样品,在某一条件下用电泳检查,显示一条带,因此说明,该样品是纯的。
【判断题】蛋白质样品,在某一条件下用电泳检查显示一条带,说明该样品一定是纯的
【单选题】The taste of the food was so______ that it was hardly noticeable.
【单选题】In no country _______ France, as is often said, ________ taste so many kinds of delicious cheese.