We are confident that the environment________by our further efforts to reduce pollution.                                                                (2013·辽宁，30)

A．had been improved

B．will be improved

C．is improved

D．was improved

属于急性淋巴细胞白血病特点的是

A．白血病细胞过氧化物酶染色阳性
B．篮细胞易见
C．白血病细胞苏丹黑染色阳性
D．白血病细胞非特异性酯酶染色强阳性
E．白血病细胞糖原染色阴性