Hearing the news, they are() joy and sorrow. A: alternatively B: alternately C: jointly D: mutually

We could take the train or ______go by car. A: [A] alternatively B: [B] alternately C: [C] instead D: [D] oppositely

Beijing’s private cars will be banned from the roads ______ for one day a week during a six-month trial period. A: incidentally B: B. occasionally C: randomly D: D. alternately

In tropical, subtropical and warm temperate humid climate zones, water and salt movement is dominated by ( ). A: upward movement B: downward movement C: up and down movement alternately D: vertical

Which of the following is not characteristic of atopic dermatitis at all ages A: It often occurs on the flexion side B: it often occurs on the extension side C: exudative skin lesions are common in infancy D: Adult rashes are similar to neurodermatitis E: the lesions can be relieved and attack alternately

Which of the following descriptions about β-sheet is correct? A: It belongs to the tertiary structure of proteins B: Two peptide chains can not be anti-parallel C: The side chain of amino acids alternately is located above the peptide unit D: The skeleton of the main chain is zigzag E: There is no hydrogen bond between β-sheet peptide chains